A Rock, Dropped from Rest near the Surface of an Atmosphere-Free

question 73

Multiple Choice

A rock, dropped from rest near the surface of an atmosphere-free planet, attains a speed of 20.0 m/s after falling 8.0 meters.
-How long did it take the object to fall the 8.0 meters mentioned?

• A)0.40 s
• B)0.80 s
• C)1.3 s
• D)2.5 s
• E)16 s

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